Middle School Life Science Quiz
20 questions · no time limit
0:00
ECOSYSTEMS: INTERACTIONS, ENERGY, AND DYNAMICS
Question 1 of 20
No time limit
Current
Answered
Flagged
Not seen
A grassland experienced a 3-year drought (less rainfall, drier soil). Population surveys were taken before the drought and at the end of year 3.
Evidence (before → after): grasses: 75% → 40% ground cover; rabbits: 48 → 20 per hectare; hawks: 10 → 6 nesting pairs.
Which statement is supported by the evidence about the ecosystem change and population response? (Arguments must be evidence-based.)
YOUR PROGRESS
20
QUESTIONS
Ready when you are
Answer in any order. Your progress shows here as you go.
QUESTIONS
KEYBOARD
Pick an answer ABCD
Next question ↵→
Previous ←
Flag for review F
Answers save as you go · flagged questions come back at the end